/* TUTORIAL GRBY
Author: Nicola Orsini - IMM, KI
Date: 2004/04/03
*/

capture net install http://nicolaorsini.altervista.org/stata/grby
which grby
webuse lbw, clear
xtile aged = age, nq(10) 
label var aged "decile age"
label define smoke 0 "No" 1 "Yes"
label values smoke smoke
label var smoke "smoking"
grby lwt race, nu format(%9.0g)
grby lwt race smoke, nu format(%9.0g)  
grby lwt race smoke, nu format(%3.1f) mean v v1 v2
grby lwt race smoke, nu format(%3.1f) mean ci(95)
grby lwt race smoke, nu format(%3.1f) mean ci(95) v  v1 v2  
grby lwt race smoke, nu format(%3.1f) mean ci(95) v  v1 v2 connect
grby lwt aged, nu 
grby lwt aged smoke, mea ci(95) 
grby lwt aged race, mea ci(95) co v v2
grby lwt aged race, mea ci(99) co v v2 yscale(100 200)